%0 Journal Article
%A Miglior, S
%A Albe, E
%A Guareschi, M
%A Mandelli, G
%A Gomarasca, S
%A Orzalesi, N
%T Intraobserver and interobserver reproducibility in the evaluation of ultrasonic pachymetry measurements of central corneal thickness
%D 2004
%R 10.1136/bjo.2003.023416
%J British Journal of Ophthalmology
%P 174-177
%V 88
%N 2
%X Purpose: To assess reproducibility of central corneal thickness (CCT) measurement by means of ultrasonic pachymetry. Methods: Fifty one volunteers underwent three sessions of CCT measurements, each consisting of three CCT measurements, performed by each of three different observers. Intra- and interobserver reproducibility was calculated by means of intraclass correlation coefficient (ICC). The expected range of variability between two independent evaluations was calculated using scatter plots of each test-retest difference against their mean. The standard deviation of the mean differences in the test-retest scores was used to describe the differences in the score spread. Results: The ICC ranges of the intra- and interobserver evaluations were 0.95–0.97 and 0.89–0.95 respectively; the expected variability was ⩽±1% and ⩽± 2% respectively (95% confidence interval). Conclusions: The measurement of CCT by means of ultrasonic pachymetry is highly reproducible.
%U https://bjo.bmj.com/content/bjophthalmol/88/2/174.full.pdf